Manufacture of artificial silk



Jan. 31, 1928". j 1,657,697

F. w. SCHUBERT MANUFACTURE OF ARTIFICIAL SILK Filed June 21, 1926 l a l Mik Illllllllillgg E MQW.

Patented Jan. 31, 19.28.

UNITED STATES PATENT OFFICE.

FRIEDRICIEI- WILHELM SCHUBERT, F APPERLEY BRIDGE, NEAR BRADFORD, ENG- LAND, ASSIGNOR TO BRYSILKA, LIMITED, OF AIPERLEY BRIDGE, NEAR BRADFORD.

ENGLAND.

Application filed June 21, 1926, Serial No.

This invention relates to apparatus for use in the manufacture of artificial silk laments, threads and the like from cuprammonia cellulose solutions according to the stretch spinning method. The chief object of the present invention is to provide for -the preparing or mixing of the viscous solution without evolving or accumulating gas or vapour and thereby enable the filaments,

l0 threads or the like to be spun and manufactured more eectively on a commercial scale.

According to this invention the raw tiltered viscous solution is automatically fed under pressure by a pump having a positive delivery to a mixer and cooler whereby any unevenness in viscosity or percentage of cellulose is levelled up by means of fine disintegration and intense cooling before it is passed to the spinncre'tte.

In order that the invention may be clearly understood and readily carried into effect, they same will now be more fully described with reference to the accompanying drawings in which Figure 1 is a half longitudinal section and haltside elevation of a mixer and cooler according to the invention, and Figure 2 is a half transverse section and half end elevation of Figure 1.

Referring to the drawings, the raw ltered viscous solution is automatically fed by a pump (not shown) having a positive delivery to the inlet 1 of the mixer and cooler which comprises a cylindrical vessel or casing 2 divided into chambers or compartments 3 by partition members 4 fitted with tubes 5 through which the material is fed to the outlet 6, while adjacent and close up to the ends of the tubes 5 are rotary blades or stirrers 7 which cut oil' very finely and remove and break up the material as it is delivered to and issues from the tubes 5, said rotary blades or stirrers 7 being mounted on and rotated by a centrally'disposed driven l shaft 8 working in bearings 9 in the end wall MANITFACTURE OF ARTIFICIAL SILK.

117,532, and in Great Britain July 2, 1926.

of the vessel or casing 2. Cooling water is circulated by way of inlets 10 and outlet 11 through the chambers or compartments 3 containing the tubes 5 to prevent the temperature of the material passing through said tubesy 5 being raised unduly, and in this connection provision is made in the form of thermometer pockets 12 whereby upon insertion of thermometers therein, the temperature at any stage of the mixing and cooling process may be readily ascertained. The casing 2 is provided with three cocks 13 whereby samples of the material may be drawn o at any desired stage of the mixing and cooling process.

I am aware that it has been proposed in machines, for producing or treating emulsions, of the kind comprising a vessel having alternated xed baiie discs and stirring devices, to perforate the batiie discs for the passage of the liquid; also in the spinning of articial filaments to supply the solutions to the nozzles by a gear pump of the type consisting of one or more coplanar pairs of gear wheels which, by their rotation, draw the solution through an opening in one side of a closely enveloping casing and transmit it around their peripheries to an opening on the other side of the casing in connection with the spinning nozzles.

No claim is herein made to the hereinbefore described apparatus, as the same forms the subject matter of a divisional application, led July 7, 1927 Serial No. 204,079.

In the manufacture of artificial silk from viscous liquids or solutions, delivering the raw filtered viscous solution under pressure by a pump to a mixer and cooler whereby any unevenness in viscosity or percentage of cellulose is levelled up by means of fine disintegration and intense cooling before it is passed to the spinnerette.

FRIEDRICH WILHELM SCHUBERT. 

